From 7fb5ed00a2b2e01243660b7a894c4b667e8fbed3 Mon Sep 17 00:00:00 2001
From: Saxon <saxon@ausocean.org>
Date: Tue, 7 Jan 2020 13:53:26 +1030
Subject: [PATCH] codec/mjpeg/jpeg.go: simplified copies

---
 codec/mjpeg/jpeg.go | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/codec/mjpeg/jpeg.go b/codec/mjpeg/jpeg.go
index d5f7b270..85aef03c 100644
--- a/codec/mjpeg/jpeg.go
+++ b/codec/mjpeg/jpeg.go
@@ -336,9 +336,7 @@ func writeHeader(p []byte, _type, width, height, nbqTab int, dri uint16, qtable
 		p[idx] = byte(i)
 		idx++
 
-		src := qtable[64*i : (64*i)+64]
-		copy(p[idx:], src)
-		idx += len(src)
+		copy(p[idx:], qtable[64*i:(64*i)+64])
 	}
 
 	// Define huffman table.
@@ -402,13 +400,8 @@ func writeHuffman(p []byte, class, id int, bits, values []byte) int {
 		n += int(bits[i])
 	}
 
-	src := bits[1:17]
-	copy(p[idx:], src)
-	idx += len(src)
-
-	src = values[0:n]
-	copy(p[idx:], src)
-	idx += len(src)
+	idx += copy(p[idx:], bits[1:17])
+	idx += copy(p[idx:], values[0:n])
 
 	return idx
 }